Your little guy is so cute! Interesting to see how much he has grown in the time this orchid has developed a spike and bloomed.
Your Onc. is lovely too but I think that there are so many hybrids that are similar you likely won't get a name. There are a lot of Onc. Wildcats, but the shape and maybe size isn't quite right. It likely had Sharry Baby or it's parentage in it to get a nice scent. It will just need general Oncidium care and you seem to have figured out how to make it happy. But even if you see one looking very similar, there are likely others out there that also look similar. I would say just enjoy because they are still just as nice without names. You could call it Oscar II
